A nifty new trailer for the first major Diablo III expansion, Reaper of Souls, has popped up in a number of places on YouTube.

The trailer, which Blizzard was likely planning to debut during this weekend's BlizzCon festival, shows off a number of new features for the expansion, including, for a few moments, some sweet ponies. Also on display: A new Adventure Mode that lets you pursue bounties for XP and gold, Nephalem Rifts that teleport you to a challenge room with a "Rift Guardian" boss, a new artisan called The Mystic, an updated Paragon system, and item modifications like enchanting and transmogrification. Worth giving it a watch, in case it gets taken down.